#include <iostream>
#include <string>

int main(int argc, char const *argv[])
{
    int val_1 = 10;
    double val_2 = 10.1;

    std::string str_1 = "张三";
    std::string str_2 = "是帅哥";

    std::cout << "val_1 = "<< val_1<<std::endl;
    std::cout << "val_2 = "<< val_2<<std::endl;

    std::cout << "str_1 = "<< str_1<<std::endl;
    std::cout << "str_2 = "<< str_1 + str_2 <<std::endl;

    std::cin >> val_1;
    std::cout << "val_1 = "<< val_1<<std::endl;
    return 0;
}
